There is actually a medication prescribed by psychiatrists to their patients that can cause this condition on men. Usually they aren't bad enough to require a bra, however. Aside from that, their is several reasons why he could be wearing it, including medical reasons or genetics.

I don't really have an opinion either way about it, though. If it helps? Good. If it doesn't? Not my body.

Don't harp on the poor man just 'cause he needs some support. I've seen men who could do well to wear a bra. But usually, it's mostly due to excess weight. This dude sounds like he may have a medical condition and is self-conscious about it, worrying about people who will judge him for things he can't control, and then those same people posting internet forum topics about him and his misfortune.

(I mean no offense to you, OP. I'm kind of joking.)

The guy wasn't overweight. He was smaller then me really. I dont want to sound like some bad guy..I think I was more concerned than bothered. I dont know why but the guy was on my mind most of the day.

As others have pointed out, there is a medical condition called gynecomastia that causes the enlargement of breast tissue on males. It's caused by an imbalance of testosterone and estrogen. I recall an episode of Doc Martin (British dramedy) where two men in the village displayed this symptom after sleeping with a women who excessively used an estrogen gel. Good episode.

And, yeah, I can understand being a little shaken by something that you're not used to seeing. What kind of area do you live in, if you don't mind me asking? Because down here in the city, this is mere child's play. You see some crazy shit walking down the streets.

Never been. (Except Disney World, but that doesn't count.) I know a couple folks from Florida, though, and they characterize it as more conservative than where I live (Baltimore, Maryland). Could be why you don't see bra-wearing men down there that often, haha.

Some of our bras are comfier than shit... perhaps he was having back problems... or his nipples constantly rubbed against his shirt. Think of the reason why women have them and why it'd be a negative not to have one.

I'm not sure if this is the case, but in some cases men who are exposed to hormones that some women take to make themselves more attractive end up growing breast, so maybe his wife was taking those hormones and they started effecting him as well

When I worked at a grocery store, we used to have this dude show up wearing full on makeup, a dress (wouldn't have been too disturbing if it was at least a different dress every time, but it was always the same one), long hair, and high heels. This isn't unusual to me. Why would a bra wearing dude? Was he wearing it out of his clothes and not wearing a shirt or something? If that isn't the case, then this isn't awkward.

I don't see what the problem was. Was he hurting you? I don't think so. Was he looking at all the people staring at him? well wouldn't you if everyone was staring at you?

I'm sorry what non-event was this about again?

I am sorry, but this is just insulting the OP. If something is weird it's weird and it's perfectly fine to react to that. If somebody is blind there is nothing wrong with people being a lot more aware of them. And if this person - be male or female - fascinated/disgusted/anything else somebody, it's perfectly fine if he asks about it. The important thing is how you would treat that person - in a fair and good way -. That would still be different from how you treat somebody who looks normal, nothing wrong with that in principle. What you're doing is declaring that nobody is allowed to interact with this world anymore except if they hurt you (facepalm) . Sorry, but it's just incredibly wrong what you're doing, because going down your path none of us would have learned about gynecomastia (not saying that was it, cause people with these kind of things tend to become entirely 'immune' to stares) and all we would become is mindless robots of a individualized society where nobody cares about truth and the world anymore, but only about personal equilibria and their own little life. Don't be afraid to judge other people and treat them by your own morals, nothing wrong with having morals. Do take measure though to not judge till you know people's story (and that's why it's important to know about for example a lot of illnesses), but stay clear of just considering everything ok as long as it doesn't affect you, because that's a route that leads you and society as a whole to destruction.

(Sorry for the too serious post, possibly papagolfwhiskey was just trolling and I fell for it a child, but had to reply)

I beg to differ. I don't think I'm wrong.
I DID apologize already for overstating my case due to my own baggage. But really come on the end of the world because I found The OP's post to display a sad level of ignorance?

A simple google search would have told the OP plenty and probably more accurately than what's been posted here.

And the text of the story belies the title. The OP didn't see a 'man wearing a bra' She saw a Person She thought was a man (other mother was less certain) who appeared to have breasts.

There could have been many reasons for this. It could have been an otherwise manish woman just out in comfortable and servicable clothes.

It could be a Transman, who decided the chest binder hurt too much today so heck with it. Let'em stare.
It could be Trans-woman still trying to figure out female clothes.

It could have been lots of things that really aren't anyone elses business, and NO ONE deserves to be treated like a carnival side show. just for being a little different.